cannot access LVM1 any more

Hello everybody,

I have a really big problem: I cannot access my LVM1 PVs, VGs an LVs any more. So the system does not boot up.

The system was installed with Debian Woody and LVM1. I created 1 PV, 1 VG and some LVs. Later (maybe when changing to Sarge or Etch) I moved to LVM2, so I thought, I could remove the package lvm10 from the system. At some time I added another PV to the VG, resized one of the LVs.

Maybe because of one of this or when changing from Kernel 2.4 to 2.6.18 I obviously lost support for LVM1.

The last messages from the running system were:

# vgdisplay 
    Invalid LV in extent map (PV /dev/sda3, PE 1080, LV 5, LE 0) 
    Couldn't fill logical volume maps. 
    Invalid LV in extent map (PV /dev/sda3, PE 1080, LV 5, LE 0) 
    Couldn't fill logical volume maps. 
    Volume group "volg1" not found

As said before, after a reboot the system did not come up again telling me, it cannot find the LVs.

Please help me as I need the system and don't want to reinstall it. If you need some more information, please drop me a mail.

Maybe there is a live-CD with old LVM1-support available with which I could boot, activate the old LVM, chroot to it and reinstall the lvm10-Package? (I would need the module megaraid since the PVs are on an hardware-RAID.)

Thanks a lot in advance.

Paul

Some details:

# fdisk -l /dev/sda 

Disk /dev/sda: 73.4 GB, 73410805760 bytes
254 heads, 63 sectors/track, 8960 cylinders
Units = cylinders of 16002 * 512 = 8193024 bytes

    Device Boot      Start         End      Blocks   Id  System 
 /dev/sda1   *           1         244     1952212+  83  Linux 
 /dev/sda2             245        4485    33932241   8e  Linux LVM 
 /dev/sda3            4486        8960    35804475   8e  Linux LVM 

There are two PVs, because some time the 36GB disk was replaced by a 7GB one.

# pvdisplay 
    --- Physical volume --- 
    PV Name               /dev/sda2 
    VG Name               volg1 
    PV Size               32,36 GB / not usable 48,95 MB 
    Allocatable           yes (but full) 
    PE Size (KByte)       32768 
    Total PE              1034 
    Free PE               0 
    Allocated PE          1034 
    PV UUID               O17ru0-C8v2-3iLh-6isM-Z3n5-mn41-6nhDky 

--- Physical volume ---

    PV Name               /dev/sda3 
    VG Name               volg1 
    PV Size               34,15 GB / not usable 53,31 MB 
    Allocatable           yes 
    PE Size (KByte)       32768 
    Total PE              1091 
    Free PE               11 
    Allocated PE          1080 
    PV UUID               pe1zVS-YN39-Rw1k-Esfg-WIdG-cl5h-OhDZmF 

One VolumeGroup on the PVs:

# vgdisplay 
    --- Volume group --- 
    VG Name               volg1 
    System ID             Knoppix1091952233 
    Format                lvm1 
    VG Access             read/write 
    VG Status             resizable 
    MAX LV                256 
    Cur LV                5 
    Open LV               5 
    Max PV                256 
    Cur PV                2 
    Act PV                2 
    VG Size               66,41 GB 
    PE Size               32,00 MB 
    Total PE              2125 
    Alloc PE / Size       2114 / 66,06 GB 
    Free  PE / Size       11 / 352,00 MB 
    VG UUID               J75sG2-mUcD-aUet-g4EV-y3AS-UNfb-2LRwhj 

with some LVs inside:

# lvdisplay 
    --- Logical volume --- 
    LV Name                /dev/volg1/logv1 
    VG Name                volg1 
    LV UUID                000000-0000-0000-0000-0000-0000-000000 
    LV Write Access        read/write 
    LV Status              available 
    # open                 1 
    LV Size                1,97 GB 
    Current LE             63 
    Segments               1 
    Allocation             normal 
    Read ahead sectors     1024 
    Block device           254:0 

[...]

additional info:

# pvscan --version
  LVM version:     2.02.05 (2006-04-21)
  Library version: 1.02.05 (2006-04-19)
  Driver version:  4.6.0

also only tells:

# pvscan
  Invalid LV in extent map (PV /dev/sda3, PE 1080, LV 5, LE 0)
  Couldn't fill logical volume maps.
  Invalid LV in extent map (PV /dev/sda3, PE 1080, LV 5, LE 0)
  Couldn't fill logical volume maps.
  No matching physical volumes found

Hello, there,

I still need help regarding this topic. Do you need some more information? Then please tell me.

In the meantime the system has been reinstalled, but a clone copy of the old system exists. I am trying to rescue the old data. When working on this I found a vgcfgbackup-file with valid-looking data. It begins with

---
# Generated by LVM2: <Date>

contents = "Text Format Volume Group"
version = 1
---

When trying "vgcfgrestore -f </above/described/file> volg1" on a Knoppix 5.0.1 with LVM version 2.02.05 (Details at the end of quoted posting) I get

PV /dev/hde2 is a different format (seqno lvm1)
Restore failed.

What can I do to get my data back?

Thanks

Paul

And from another posting:

You tried command line arg: -M1 ?

Alasdair

[email protected]

As soon as I did so, I could restore the LVM-config and then my data. Unfortunately I had not found the parameter in the man-page, although it is really there.

Good things come to those who wait. Thank you very much for your help!

Greetings,

Paul